Elapsed time worksheets
Ten “start at 7:30, 45 minutes later…” problems — clock arithmetic in its most useful form.
Best fit: 3rd grade · 8 sheets, answer keys included · Free, no sign-up
The full set: 8 worksheets with answer keys
Eight sheets in the same layout with different problems: download them as one PDF or print one at a time.
Worksheets
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Sheet 1
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Sheet 2
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Sheet 3
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Sheet 4
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Sheet 5
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Sheet 6
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Sheet 7
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Sheet 8
Answer keys
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Sheet 1 answers
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Sheet 2 answers
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Sheet 3 answers
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Sheet 4 answers
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Sheet 5 answers
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Sheet 6 answers
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Sheet 7 answers
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Sheet 8 answers
About these worksheets
Elapsed time puts clock reading to work: start at a time, add hours and minutes, and find the new time. Most mistakes happen when the answer crosses the hour. Each sheet’s ten problems mix whole hours, half hours and quarter-hour durations. Encourage the number-line strategy: hop to the next whole hour first, then add what remains.
Grade level: these worksheets are part of our 3rd grade math worksheets collection.
Frequently asked questions
What strategy works best for elapsed time?
The time number line: from 7:30, hop 30 minutes to 8:00, then add the rest. Two easy hops beat one hard calculation.
Do problems cross the 12 o’clock boundary?
Yes, a few. Start times run from 6:00 to 10:00 and durations stay under four hours, so most answers land before noon, but most sheets have one to three that run past 12:00, like 10:00 plus 3 hours and 30 minutes. The keys write those on the 12-hour clock (1:30), and they’re worth talking through: the hop to 12:00 is still the first step.
How can I use the set to check progress?
Give sheet 1 cold, teach the number-line hop over the next few days with sheets 2–7, then give sheet 8 the same way. Same format, different times, so most of the change in score comes from the skill.